Where do I get clams?

When I got my Bimac from Octopets I orderd the 200 clams. Let me tell you that Plupo Loves them. I think she is out growing how small they are. I was wondering if anyone knows where to get some clams that are maybe a half inch to an inch. I can get lots of crabs but she tends to like the clams for now.

Shoot...is there a chance you could hit a local fish market? They should have small clams ( are they called "bead" clams?) that they usually toss out when they get a new delivery...might work out well.